Materials Today Communications
·
2020
·
IF 2.678
Yingjuan Wei,Guanjun Pan,Yi He
Developing a technique for the detection of nitro-alkanes, which are explosive and toxic, is vital. However, it is hard to selectively detect these compounds at low concentrations for early leakage warning. Here, a nanocomposite material was prepared to promote electron transfer and enhance the content of chemically absorbed oxygen by creating an n-n heterojunction between CdIn 2 O 4 and In 2 O 3 , leading to an enhanced response, shortened response time and reduced working temperature. As a result, the best sensor was found to exhibit an ultra-high response of 78 to 10 ppm nitropropane with quite a low detection limit of 50 ppb at 100 °C. Furthermore, the designed sensor was nearly insensitive to ethanol, acetone, hydrogen, CO, methanol, toluene and methane. Presently, the sensor demonstrated the highest response among those studied in previous investigations.
研究领域:
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Hongtao Wang,Yuanchao Xie,Yang Liu,Yaodan Zhang,Jianan Ma,Jiaqi Yang
The enhanced sensitivity and selectivity of NO 2 gas sensors are crucial for atmospheric environmental monitoring. In this study, a novel NO 2 gas sensor based on small-sized ZIF-8/In 2 O 3 core-shell nanocube has been developed through a simple solvothermal method along with in situ modification. The ZIF-8 coating significantly increased the specific surface area of the In 2 O 3 nanocubes from 60.64 m 2 /g to 140.84 m 2 /g, while also boosting the adsorption of oxygen ions on the surface. Gas-sensing tests revealed that the ZIF-8/In 2 O 3 composites exhibited a response of 56.3 to 1 ppm of NO 2 , with an exceptionally low detection limit of 1 ppb. Notably, the sensor demonstrated outstanding selectivity for NO 2 over other potential interfering gases. The remarkable NO 2 sensing performance of the ZIF-8/In 2 O 3 composites can be attributed to the grain boundary effects in the In 2 O 3 nanocubes (with side lengths of approximately 40–50 nm), as well as the sensitizing and filtering effects of the ZIF-8 layer. This work holds significant promise for the rapid detection of low-concentration NO 2 gases in various applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 29
·5060-5069
·
IF 3.545
Zishuo Li,Chengming Lou,Guanglu Lei,Guocai Lu,Hongyin Pan,Xianghong Liu,Jun Zhang
Metal oxide semiconductor heterostructures are promising for gas sensors due to their unique chemical and electronic properties at the heterointerface. In this work, a highly sensitive and selective gas sensor for the detection of nitrogen dioxide (NO2) is reported based on In2O3/ZnO heterogeneous nanospheres designed by atomic layer deposition (ALD). Their electronic properties at the In2O3/ZnO heterogeneous interface can be tuned by varying ZnO ALD cycles. Gas sensing tests show that ZnO ALD significantly improves the sensor performance of In2O3 nanospheres, rendering a response of 7.9 to 10 ppm NO2 even at room temperature (RT). The sensor based on In2O3/ZnO with 30 cycles of ZnO ALD delivers the best response of 139.9 to 10 ppm NO2 at an operating temperature of 180 °C, showing a nearly 6-fold enhancement over pristine In2O3. Meanwhile, the In2O3/ZnO sensor also exhibits a low limit of detection of 35 ppb, which allows for reliable detection of sub-ppm NO2. The excellent sensor performances are correlated to the modulation of electron depletion layers at the In2O3/ZnO heterointerface, which sheds some light on designing new materials via ALD for the detection of hazardous gas molecules.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jun He,Xiaoyu Qi,Jingjing Liu,Hao Zhang,Zhongliao Wang,Deliang Li,Shuwang Duo
Triethylamine is a typical volatile toxic gas that can cause respiratory system diseases, blood diseases, and eye lesions upon prolonged inhalation. To mitigate this problem, a highly sensitive triethylamine sensor was achieved by loading the precious metal Au onto hexagonal hollow prisms of In 2 O 3 . Prominently, the microstructure of the hollow hexagonal prisms was derived from Material Institute Lavoisier(MIL)-68(In), which provided a larger specific surface area and more active sites. The sensing test results manifested that the sensor based on 0.6% Au/In 2 O 3 owned the best sensing performance among all samples, especially with the response value of 476.3 ( R a / R g ) towards 100 ppm triethylamine at 200°C, which was 37 times higher than that of pristine In 2 O 3 sensor. Additionally, the stability deviation value was less than 5.6% and the selectivity ( Response triethylamine / Response ethanol ) reached up to 28.8. Such distinguished characteristics can be attributed to the delicate hollow hexagonal prisms structure and the decoration of Au, which accelerated gas molecules transport and enhanced oxygen molecule adsorption and dissociation. This work may open up new visas for morphology manipulation of triethylamine sensing materials and intrinsic mechanism of performance enhancement.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 18
·1-12
·
IF 2.8
Yao Yao,Liao Gangli,Cui Huina,Dong Wenbin,Zhao Zhen
A novel monodispersed In 2 O 3 @ZIF-8 core–shell nanocomposites (CSNCs) are prepared via a simple sonochemical synthesis route in this work. It is found that the encapsulation of In 2 O 3 nanoparticles into ZIF-8 shell can greatly extend the light response of CSNCs into visible light region. Benefiting from the large surface area, porous nanostructure and synergistic effect between In 2 O 3 and ZIF-8, the In 2 O 3 @ZIF-8–175 CSNC exhibits selectivity and ultra-high photocatalytic activity for organic dye acid fuchsin removal. This work not only provides a general synthesis route for fabrication of such unique and monodispersed core–shell heterostructures but also paves a new way for high performance photocatalyst for other hazardous ions selective removal in practical application.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Xiangan Zeng,Li Liu,Yifeng Lv,Bing Zhao,Xiangnan Ju,Suyan Xu,Jianxia Zhang,Chunxia Tian,Dan Sun,Xiaonian Tang
La 2 O 3 -In 2 O 3 composited beaded nanotubes (LIBNTs) and pure In 2 O 3 nanotubes (INTs) were fabricated via a simple electrospinning method. By means of SEM, XRD and XPS analysis, we determined the surface structure, crystal phase and chemical properties of the materials. By test, we determined that the optimum operating temperature of LIBNTs-based sensor was a low temperature of 128 °C. The test results also revealed that LIBNTs-based sensor has an ultra-sensitive response to formaldehyde (101.9/50 ppm) and a faster response/recovery property (3 s and 19 s) compared with INTs-based sensor. The LIBNTs-based sensor also exhibited good linearity, repeatability and selectivity.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Zhuping Li,Yong Men,Shuang Liu,Jinguo Wang,Keye Qin,Dandan Tian,Tianle Shi,Li Zhang,Wei An
The crystalline phases of support have great influence on their surface and structure properties. Therefore, adjusting the crystalline structure of heterogeneous catalysts imposes a significant impact on the catalytic performance. Herein, a suite of Pd/In 2 O 3 /ZrO 2 catalysts with different crystalline phases of ZrO 2 were prepared and evaluated for CO 2 hydrogenation to CH 3 OH using the same amount of metal loading. The activity data showed the distinct superior reactivity of Pd/In 2 O 3 /ZrO 2 catalyst used mixed monoclinic and tetragonal phases ZrO 2 (Mix-ZrO 2 ) as support as compared to respective single phase of monoclinic ZrO 2 (m-ZrO 2 ) and tetragonal ZrO 2 (t-ZrO 2 ). The catalysts are extensively characterized through BET, XRD, HRTEM, UV–vis, H 2 -TPR, CO 2 /H 2 -TPD and XPS. Combining the characterization results and activity data, the superior activity of Pd/In 2 O 3 /Mix-ZrO 2 catalyst can be correlated with large particle size of Pd nanoparticles, the concentration of oxygen vacancies, and the abundant medium basic sites, which were essential for activation of H 2 and inert CO 2 and enhancement of catalytic performance. The best-performing Pd/In 2 O 3 /Mix-ZrO 2 catalyst exhibited a remarkable reactivity with space time yield (STY) of 0.54 g methanol ·h −1 ·g cat −1 at 573 K and 5 MPa, and stability without noticeable deactivation after 100 h of time on stream, demonstrating its potential as catalyst used in CH 3 OH synthesis from CO 2 hydrogenation.
研究领域:
催化化学
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材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yumeng Liu,Jinniu Zhang,Gang Li,Jia Liu,Qingfei Liang,Hongjun Wang,Yuanyuan Zhu,Jianzhi Gao,Hongbing Lu
In 2 O 3 –ZnO nanotubes were prepared by a solvent thermal method using electrospun indium nitrate–polyvinyl pyrrolidone [In(NO 3 ) 3 –PVP] nanofibers as a sacrificial template. The sensing properties toward NO 2 of this kind of new emerging sensing material were explored. Compared with as-electrospun In 2 O 3 nanofibers, the In 2 O 3 –ZnO composite nanotubes exhibited higher responses and better selectivity to NO 2 . The response of the In 2 O 3 –ZnO nanotubes to 500 ppb NO 2 at room temperature (RT, 25 °C) under UV irradiation was as high as to 32.73, which was 3.33 times higher than that of the In 2 O 3 nanofibers. Moreover, even under a high relative humidity of 80%, the RT NO 2 response of the In 2 O 3 –ZnO composite nanotubes can still reach up to 3.50–500 ppb. The enhanced NO 2 sensing characteristics were mainly ascribed to the formation of In 2 O 3 –ZnO n–n heterojunctions , the enhanced light absorption, and the increased oxygen vacancy proportion. The results suggested that In 2 O 3 –ZnO nanotubes had good potential for the selective and sensitive detection of ppb-level NO 2 at RT.
研究领域:
材料科学
·
环境监测
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 12
·8227-8237
·
IF 3.9
Xiaofei Fu,Junwu Tao,Zizhou Zhao,Siwen Sun,Lin Zhao,Zuming He,Yong Gao,Yongmei Xia
Reducing the recombination rate of photoexcited electron–hole pairs is always a great challenging work for the photocatalytic technique. In response to this issue, herein, a novel Z-scheme CuInS2/In2O3 with interfacial S–O linkages was synthesized by a hydrothermal and subsequently annealing method. The Fourier transform infrared (FT-IR) and X-ray photoelectron spectrometer (XPS) measurements confirmed the formation of covalent S–O bonds between CuInS2 and In2O3. The quenching and electron spin resonance (ESR) tests revealed the Z-scheme transfer route of photogenerated carriers over the CuInS2/In2O3 heterojunctions, which was further verified theoretically via density functional theory (DFT) calculations. As expected, the CuInS2/In2O3 heterojunctions showed significantly boosted photocatalytic activities for lomefloxacin degradation and Cr(VI) reduction under visible light illumination compared with the bare materials. Accordingly, a synergistic photocatalytic mechanism of Z-scheme heterostructures and interfacial S–O bonding was proposed, in which the S–O linkage could act as a specific bridge to modify the Z-scheme manner for accelerating the interfacial charge transmission. Furthermore, the CuInS2/In2O3 heterojunction also exhibited excellent performance perceived in the stability and reusability tests. This work provides a new approach for designing and fabricating novel Z-scheme heterostructures with a high-efficiency charge transfer route.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 14
·10191-10203
·
IF 3.442
Yu Han,Chen Fenghua,Ye Li,Zhou Heng,Zhao Tong
Ion co-doped photocatalysts with In 2 O 3 /TiO 2 heterostructure (In 2 O 3 /TiO 2 (m)) were prepared through a new polymeric precursor method. The In 2 O 3 /TiO 2 (m) precursor solution is of salient advantage in coating photocatalysts on various substrates and multiple modifications. The photocatalysts were facilely obtained after the calcination of precursors. Mass ratio of In/Ti was optimized according to their photocatalytic performances, and IT(m)-3 ( w In/Ti = 3%, modified by N, B co-doping) showed the best photocatalytic activity. The band gap was successfully narrowed to 2.37 eV, and In 2 O 3 /TiO 2 heterostructure was successfully constructed in the photocatalysts. Visible light absorption and separation of photoexcited carriers were significantly enhanced. Under visible light, NOX (20 mg/L in the water) was 100% photodegraded in 10 min, with 100% TOC removed in 25 min. The IT(m)-3-loaded quartz fabrics (ITQ) also showed excellent photocatalytic performance. The photocatalytic activity of ITQ was repeatable and stable in 45 rounds of recycle without centrifugation. Synergetic effect of heterostructure and element doping was considered contributing to the outstanding photocatalysis performance. The polymeric precursor method proposed in this work showed great potential in large-scale preparation and application of immobilized photocatalysts. The synergetic improvement through co-modifications showed its proper compatibility with modifications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2023
·
IF 16.5
Zhijie Zhang,Xuesheng Wang,Huiling Tang,Deben Li,Jiayue Xu
Modulating the internal electric field (IEF) represents a potential strategy to stimulate the photocatalytic activity of heterojunctions, especially S-scheme photocatalysts. Herein, a Cs 3 Bi 2 Br 9 @V O -In 2 O 3 (CBB@V O -In 2 O 3 ) S-scheme heterojunction, of which Cs 3 Bi 2 Br 9 perovskite quantum dots (PQDs) are embedded into mesoporous V O -In 2 O 3 hosts, is rationally designed as a cornerstone for further IEF manipulation. Briefly, by introducing oxygen vacancies (V O ) into the composed reduction semiconductor (mesoporous In 2 O 3 ), an enlarged Fermi level ( E F ) gap between CBB and V O -In 2 O 3 is achieved, yielding an intensified IEF over the CBB@V O -In 2 O 3 heterojunction. Such an enhanced IEF affords a much more robust driving force for directional carrier delivery, leading to accelerated carrier transfer of CBB@V O -In 2 O 3 heterojunction. Consequently, the optimized CBB@V O -In 2 O 3 heterojunction features desirable CO 2 -to-CO conversion efficiency, and its CO production rate reaches 130.96 μmol g −1 h −1 . The reaction intermediates and CO 2 photoconversion pathway were unraveled by in-situ diffuse reflectance infrared Fourier transform spectroscopy. Combining with the DFT calculation, it was revealed that oxygen vacancies in V O -In 2 O 3 act as reactive centers, which optimize the coordination modes of the intermediates, thus reducing the activation energy for photocatalytic CO 2 reduction. Our work demonstrates that the IEF modulation of S-scheme-based heterojunction could significantly boost the charge separation and then to drive efficient catalytic reaction , achieving high-efficiency solar fuel production.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 28
·2201668
·
IF 15.153
Lin Zhao,Bixia Yang,Guoxin Zhuang,Yonglin Wen,Tingshi Zhang,Mingxiong Lin,Zanyong Zhuang,Yan Yu
Exploitation of atomic-level principles to optimize the charge transfer on ultrathin 2D heterostructures is an emerging frontier in relieving the energy and environmental crisis. Herein, a facile “topological-atom-extraction” protocol is disclosed, i.e., selective extraction of Zn from ultrathin half-unit-cell ZnIn 2 S 4 (HZIS) can embed thin In 2 O 3 domain into 1.60 nm thick HZIS layer to create an atomically thin in-plane In 2 O 3 /HZIS heterostructure. Thanks to the optimal distance and capability of charge separation, the in-plane In 2 O 3 /HZIS heterostructure is among the best ZnIn 2 S 4 -based CO 2 reduction reaction (CRR) photocatalysts, and indeed demonstrates a significant increase (from 6.8- to 128-fold) in CO production rate compared with those of out-plane ZIS@In 2 O 3 and out-plane In 2 O 3 -HZIS calcined heterostructures. Density Functional Theory simulation reveals that whereas the out-plane heterostructure has a much smaller ∆q of 0.2–0.25 e, the in-plane heterostructure with “zero distance contact” has an optimal ∆q of 1.05 e between In 2 O 3 and HZIS that induces remarkable charge redistribution on the in-plane heterojunction interface and creates local electric field confined within the ultrathin layer. The charge redistribution efficiently directs the charge-carrier separation in S-scheme photocatalytic system and endows long-lifetime carrier to CRR active HZIS. The findings demonstrate the strong versatility of engineering atomic-level heterojunctions for efficient catalysts design.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）